Method for gain matching neutron detectors containing various He-3 partial pressures

Abstract

An arrangement for detecting neutrons. A first neutron detector includes at least some helium, and may include some Helium-3. The first neutron detector has an associated gain performance. A second neutron detector includes at least some helium. The second neutron detector may include some Helium-3 and may include some Helium-4. The second neutron detector has an associated gain performance. In an aspect, the gain performance of the second neutron detector matches the gain performance of the first neutron detector. In an aspect, the amount of all helium of the second detector is the same as the amount of all helium in the first detector. In an aspect, at least one of the first and second detectors includes at least some additional, different neutron-sensitive substance. In an aspect, at least one of the first and second detectors includes some Boron-10 as the additional, different neutron-sensitive substance.

That is claimed is: 
     
       1. An arrangement for detecting neutrons, the arrangement comprising:
 a first neutron detector including at least some helium, and the first neutron detector having an associated gain performance; and 
 a second neutron detector including at least some helium and at least some additional, different neutron-sensitive substance, and the second neutron detector having an associated gain performance; 
 wherein the gain performance of the second neutron detector matching the gain performance of the first neutron detector. 
 
     
     
       2. The arrangement as set forth in  claim 1 , wherein the at least some additional, different neutron-sensitive substance includes a selected neutron sensitive material. 
     
     
       3. The arrangement as set forth in  claim 2 , wherein the selected sensitive material includes at least some Boron-10. 
     
     
       4. The arrangement as set forth in  claim 1 , wherein the first neutron detector includes at least some additional, different neutron-sensitive substance. 
     
     
       5. The arrangement as set forth in  claim 4 , wherein the at least some additional, different neutron-sensitive substance includes a selected neutron sensitive material. 
     
     
       6. The arrangement as set forth in  claim 5 , wherein the selected neutron sensitive material includes at least some Boron-10. 
     
     
       7. The arrangement as set forth in  claim 1 , wherein the at least some helium of the first neutron detector includes at least some Helium-3, the at least some helium of the second neutron detector includes at least some Helium-3, and the at least some additional, different neutron-sensitive substance includes a selected neutron sensitive gas. 
     
     
       8. The arrangement as set forth in  claim 7 , wherein the at least some additional, different neutron-sensitive substance also includes a selected neutron sensitive material. 
     
     
       9. The arrangement as set forth in  claim 8 , wherein the selected neutron sensitive material includes at least some Boron-10. 
     
     
       10. The arrangement as set forth in  claim 9 , wherein the at least some helium of at least one of the first and second neutron detectors includes at least some Helium-4. 
     
     
       11. An arrangement for detecting neutrons, the arrangement comprising:
 a first detector including helium that includes at least some Helium-3; and 
 a second detector including helium that includes at least some Helium-4, the amount of all helium of the second detector being the same as the amount of all helium in the first detector; 
 wherein at least one of the first and second detectors includes some Boron-10. 
 
     
     
       12. The arrangement as set forth in  claim 11 , wherein the first detector includes some Boron-10. 
     
     
       13. The arrangement as set forth in  claim 11 , wherein the second detector includes some Boron-10. 
     
     
       14. The arrangement as set forth in  claim 11 , wherein both the first and second detectors each includes some Boron-10. 
     
     
       15. The arrangement as set forth in  claim 11 , wherein the second detector includes some Helium-3. 
     
     
       16. The arrangement as set forth in  claim 15 , wherein the first detector includes some Helium-4. 
     
     
       17. An arrangement for detecting neutrons, the arrangement comprising:
 a first detector including at least some Helium-3; and 
 a second detector including at least some Helium-3 and at least some Helium-4; 
 wherein at least one of the first and second detectors also including at least some additional, different neutron-sensitive substance, and wherein gain performance of the first and second detectors match. 
 
     
     
       18. The arrangement as set forth in  claim 17 , wherein the at least some additional, different neutron-sensitive substance includes a selected neutron sensitive material. 
     
     
       19. The arrangement as set forth in  claim 18 , selected neutron sensitive material includes at least some Boron-10. 
     
     
       20. The arrangement as set forth in  claim 18 , wherein both the first and second detectors each includes the selected neutron sensitive material as the additional, different neutron-sensitive substance.